I'm a freelance UX designer working in an industry where only a few of the largest companies have UX designers or UX groups. Currently, I'm looking for new projects and contacting specific people in hundreds of organizations. I focus on digital products, and most of the other organizations approach their websites and other digital products from a purely web design and/or marketing approach.
Several of these prospects have told me that they already have new websites/apps/etc. under development and the designers are already picked out. They haven't given me names so far of design companies that they have hired for their projects. (To clarify, none have said "Don't bother us" yet, but the replies are short and to the point.) I've been offering to conduct usability studies or other evaluations for them along the way to help them see if they are on the right path with a design or not, but no takers yet.
What strategies/responses have proven effective for you in selling UX in this situation when all that prospects think they need is web design, graphic design, and/or marketing?